Nut-lock.



No. 878,897. PATENTBD 13:0. 8, 1,907, J. w. GHAPMAN & o. o. Foss.

. NUT LOOK.

APPLIOATION PILED AUG. 81. 1907.

s, S, D

Du .N m w .Nm .MH .UG

ArToH/VEYS.

,tions and conibinations `of parts as will be UNITED sTAtrEsfPTENT OFFICE.

JOHN W. CHAPMAN AND CHI ISTIAN C. FOSS, OF BARWICK, GEORGIA.,

NU'r-Locx.

Speoificationv of 1Letters Patent.

Patented Dec. 3, 1907 Applittuontied August 81,,1907. serial no. 890,987.

To all whom/it may concert,.- Be it'knownthat we, JOHN W. CHAPMAN and CHRISTIN' G. Foss, oitizens' of the' United States, and residents` of Barwick, in the countyl of Brooksand State of Georgia,- have invented certain new and useful 1111-' rovements vin N ut'Locks, of which the vfolowing is a specification.

This invention is an improvement in nut looks and consists in certain ,novel construchereinafter described and claimed.

In the fjlrawings Figure 1 is a top plan view of a nut embodying the inyentio'n, the key being illustrate'd in position to lockthen'ut.

Fig. 2 is a horizontal section drawn alongside the key and through the pawl. Fig. 3 is' a detail sectional view illustrating the spring which is used in Connection with the pawl on large nuts. Fig. 4: isxa detail view of the pawl; Fig. 5 is a detail view of the key."'

' The nut A has a threaded bolt hole B and is provided at one side thereof' Witha pawl chamber D which has the curved 'walls E forming a' bearing in which the pawl F may w be turned and this pawl cham er commun1- cates at one side with the bolt hole and is provided at the other-side at its upper end with a lateral Wing H in which operates the lateral tongue I at the upper end of theI pawl for engagement'by the key J presently described. J i

The pawl is provided'opposite the tono'ue I with a pawl point L which in the locke position of the paw] protrudes into the bolt hole a to engage the bolt. This pawl point-may .be aplain edge or may be serrated, as desired, and we 'have shown it serrated in Fig. a of the dv'ftwings.

In large nuts wemayemploy a spring M .Operating in a grooveiin the nut to press 'the pawl into position with its point protruding into the bolt hole.` The key is movable longitudinally in a channel N formed inthe nutl` and is provided Between its ends With a notch J' receiving the tongue on the pawl lso the movement of the key in a longitudinal direction may operate the pawl as desired; At one end the key is adapted to be bent at J2- into a groove, in .the side of the nut'to'se cure the key in position to hold the dog in engagement with the bolt. Manifestlyhowever, the end J 2 may be released vand the key operate'd to move the pawl clear ofthebolt rhenjthe nutfmay be easily turned off the o t.

It will be noticed that the pawl protrudes at `its u per end slightly below the face of the nut and the latter is burred slightly from the pawl to retain the same.

It will be noticed -that our invention is simple, permits the nut to be turned home,

4will hold the ,nut securely and can be released when desired to permit'the nut to be turned ofl" the bolt Without any inj'uryto the bolt; also the 'invention can be used on ordi-l -nary bolts involving no change in the structure of the bolt and'the bolt will not be injured in the use ofthe invention. O V w 'As best shown in Figs. .2, 3 and 5,,one end of the key is flattenedl at J 2 and will lie when bent to the position shown in Fig. 3, flush' with the outer side'of the nut, avoiding any projection beyond the face of the nut'in the positions of parts shown in Figs' 2 and y3, the pin being also of such length that it .will not protrude at either end beyondthenut in any w osition of the said key. i

1. The combination vof a nut 'having a bolt hole and a chamber therein communicating with the bolt hole and having a lateral Wing or extension, and also provided with atransverse channel4 communicating With said lateral Wing or extension of the chamber or ranged' to be protruded into the olt hole ,and provided with a tongueoperating in the lateral extensionof the -chamben orl rcess, and' 'a key movable longitudinally the transverse channel of the nut 'and having a. notch receiving the tongue of the'pawl and arranged'at one end-to be bent into engagement with the nut'to secure the key in'posi-, tion, 'all substantialiy set forth,

`2. A nut having a bent alongzthe nut wherebyto hold the rock mg pawl in place, substantially a set-'forthgrocking pawl, and a key' .movable transversely offthenut and en age'd' as and for the purpose i .chamber and having' 'at one side a pawlpoint 3., A nut having a bo'lt' hole, and a cham- Whereby said end may be bent into enga 8-; ber longside the same and cpmmunicating ment With thenut, substantially as and or 10 With the bolt holq a pawl making in the the Purpose set forth.

JQHN W. CHAPMAN. which ma' be prdtruded into the bolt hole, I CHRISTIAN C. FOSS. and a transverset key engaged Witht'he pawl Witnesses';

, at the` side thereof opposite'the paw point, w H. W. MASSY,

and projecting'jat its end beyond the nut' J. W. M'ASSEY. 

